Rafael Benitez has also been mentioned by Del Bosque as a potential successor

Martinez is contracted to Everton until the summer of 2019 and recently spoke about wanting to create a dynasty at Goodison.

He said: “The focus now goes onto the owners, what is the plan and what is the strategy behind their football clubs,” Martinez said.

“Every manager goes through good and bad periods and it’s how the manager fits into that role of building a football club. I don’t think every manager knows how to build a football club, that’s the truth.”